You must export and import the logical host environment definition file only if you perform any one of the following operations:

• When you set up the logical host environment, you change the node configuration on the logical host.
  For details about how to set up the logical host environment, see 5.3.4(2) Setting up a logical host environment on the executing node.
  
• When you set up the logical host environment of other Performance Management programs, you perform an operation that requires exporting the logical host environment definition file.
  For details about how to set up the logical host environment of other Performance Management program, see 5.3.4(2)(f) Setting up the logical host environments of other Performance Management programs.
  
• When you are setting up the network, you set the port numbers.
  For details about how to set up the network, see 5.3.4(2)(g) Setting up a network.
  

For details about how to export and import the logical host environment definition files, see from 5.3.4(2)(k) Exporting the logical host environment definition to 5.3.4(3) Setting up a logical host environment for the standby system.